Summers, winters and rain in Bartonsville all run close to those of most U.S. towns
July afternoons average 87°. Summer afternoons here are warmer than in 62% of U.S. towns. Decade by decade the climate has edged up, 1.6° above 1901–2000. Garden planting can start around April 2; autumn frost returns near November 6.
A year in Bartonsville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Bartonsville’s climate
Compared with towns across the U.S., with Bartonsville’s place in Maryland beside it.
What a year in Bartonsville feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 218 frost-free days a year
In half of years the last 32° night comes by April 2 and the first by November 6. Frost and day counts come from NOAA’s station at Frederick Police Brks, MD, 5 miles from the town’s center, at about the same height.
The 2023 USDA map puts Bartonsville’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 4°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 33 inches of snow a winter
Snow, measured at Clarksburg 2.1 Ne, MD, falls mostly in January. Precipitation (rain plus melted snow) adds up to 45 inches a year; September is the wettest month and February the driest. Rain or snow falls on about 137 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Bartonsville
75% of the work is heating. Months averaging under 55° run from November through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Frederick Police Brks, MD.
Living with Bartonsville’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
218 frost-free days in zone 7a. The last frost comes by Apr 2 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 6.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October. 0.3 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Bartonsville from natural hazards, river flooding is the largest share (66%); heat waves, cold waves, winter storms and ice storms together are 9%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Bartonsville and its neighbors
Every town next door is within a degree of Bartonsville in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Bartonsville’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Bartonsville, MD | 24° | 87° | 45" | 33" |
| South Charleston, WV | 25° | 87° | 46" | 32" |
| Rahway, NJ | 24° | 87° | 47" | 32" |
| Fort Thomas, KY | 24° | 87° | 45" | 23" |
| Nyack, NY | 22° | 86° | 47" | 33" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Bartonsville averaged 1.6° warmer than the 1900s. The biggest change is in December (+2.8°).
A bigger shift than in 64% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Bartonsville compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Bartonsville’s place among Maryland’s.
Bartonsville weather by month
Highs, lows and precipitation from NOAA’s grid at Bartonsville’s center; snow, wet days and snow on the ground from Clarksburg 2.1 Ne, MD. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 41° | 24° | 3.1" | 10.6" | 11 | 8 | 24° – 40° |
| February | 45° | 26° | 2.6" | 7.9" | 11 | 9 | 24° – 44° |
| March | 54° | 33° | 3.9" | 6.8" | 11 | 5 | 38° – 53° |
| April | 66° | 43° | 3.7" | 0.0" | 13 | 0 | 50° – 60° |
| May | 74° | 52° | 4.4" | 0.0" | 15 | 0 | 59° – 69° |
| June | 83° | 61° | 4.3" | 0.0" | 12 | 0 | 68° – 75° |
| July | 87° | 66° | 4.4" | 0.0" | 11 | 0 | 72° – 80° |
| August | 85° | 64° | 3.5" | 0.0" | 12 | 0 | 70° – 77° |
| September | 78° | 57° | 4.5" | 0.0" | 10 | 0 | 64° – 72° |
| October | 67° | 45° | 3.8" | 0.3" | 11 | 0 | 53° – 63° |
| November | 55° | 36° | 3.2" | 0.7" | 9 | 1 | 39° – 50° |
| December | 45° | 29° | 3.6" | 6.3" | 11 | 4 | 28° – 47° |
| Year | 65° | 44° | 44.9" | 32.6" | 137 | 27 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 28° to 47°. August is the most reliable, staying within 7°.
Where Bartonsville’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Bartonsville’s center.
- Snow: Clarksburg 2.1 Ne, MD.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Frederick Police Brks, MD, 5 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Bartonsville’s climate
What is the weather like in Bartonsville?
A typical July afternoon reaches 87°, a January night drops to 24°, and about 33 inches of snow falls in a normal winter. Milder January nights than 61% of U.S. towns; hotter July afternoons than 62% of U.S. towns.
How cold does it get in Bartonsville in winter?
January nights average 24°. About 84 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 24°.
How much snow does Bartonsville get?
About 33 inches in a normal winter at Clarksburg 2.1 Ne, MD, most of it in January, with snow on the ground about 27 days a year.
How hot does it get in Bartonsville?
July, with a typical high of 87° and a low of 66°. About 37 days a year reach 90° (Frederick Police Brks, MD).
When is the first and last frost in Bartonsville?
In half of years the last spring frost (32°) comes by April 2 and the first fall frost by November 6, about 218 frost-free days, at Frederick Police Brks, MD.
What growing zone is Bartonsville in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 4°.
What is the best time of year to visit Bartonsville?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Bartonsville getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 64% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Bartonsville.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.